Virtual Earth map of Castleshaw Roman fort

Castleshaw Roman fort was a fort in the Roman province of Britannia. Although there is no evidence to substantiate the claim, it has been suggested that Castleshaw Roman fort is the site of Rigodunum, a Brigantian settlement. The remains of the fort are located on Castle Hill on the eastern side of Castleshaw Valley at the foot of Standedge but overlooking the valley. The hill is on the edge of Castleshaw in Greater Manchester. The fort was constructed c. AD 79 but fell out of use sometime in the 90s. It was replaced by a smaller fortlet built c. 105 and a civilian settlement grew around it. It may have served as a logistical and administrative centre, although it was abandoned in the 120s.

The site has been the subject of antiquarian and archaeological investigation since the 18th century. The civilian settlement was only discovered in the 1990s. The fort, fortlet, and civilian settlement are all protected as a Scheduled Ancient Monument, recognising its importance as a "nationally important" archaeological site or historic building, and protecting it against unauthorised change.